CN112793343A

CN112793343A - High-efficient teaching aid

Info

Publication number: CN112793343A
Application number: CN202110154239.4A
Authority: CN
Inventors: 严如明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-05-14

Abstract

The invention provides a high-efficiency teaching aid, which comprises a blackboard eraser shell and a blackboard eraser body, wherein the blackboard eraser shell is provided with a front cover and a back cover; the blackboard eraser body comprises a dry blackboard eraser, a connecting plate and a wet blackboard eraser which are sequentially connected; a storage cavity is arranged in the connecting plate, and a water storage bag is fixed at the position of the storage cavity, which is close to the wet blackboard eraser; a water outlet pipe is arranged on the connecting plate, and a one-way valve I is arranged in the water outlet pipe; a rotating shaft is rotatably connected in the storage cavity, and the blackboard eraser shell is connected to the rotating shaft; one side of the rotating shaft, which is far away from the blackboard eraser shell, is provided with an extrusion bulge. When chalk writing on the blackboard needs to be erased, the shell of the blackboard eraser is controlled to rotate to one side of the dry blackboard eraser, the extrusion bulge contacts and extrudes the water storage bag, so that water in the water storage bag enters the wet blackboard eraser through the water outlet pipe to wet the wet blackboard eraser. Then, in the process of using the wet blackboard eraser to erase chalk writings on the blackboard, the chalk dust is directly attached to the wet blackboard eraser, the teaching environment is not easily affected, and the health of teachers and students is not easily affected.

Description

High-efficient teaching aid

Technical Field

The invention relates to a teaching aid, in particular to a high-efficiency teaching aid.

Background

At present, chinese patent publication No. CN201922793U discloses a blackboard eraser, which comprises an eraser shell and an eraser body disposed inside the eraser shell, wherein the eraser shell is made of plastic or metal, and the surface of the eraser shell is provided with grains. However, when the blackboard eraser is used for erasing chalk marks on a blackboard, a large amount of chalk dust is generated, and great influence is caused on the teaching environment.

Disclosure of Invention

In view of the above, the present invention aims to provide an efficient teaching aid, which has the advantages of being less prone to generating chalk dust when a blackboard is wiped and being less prone to affecting teaching environments.

In order to solve the technical problems, the technical scheme of the invention is as follows: an efficient teaching aid comprises a blackboard eraser shell and a blackboard eraser body arranged in the blackboard eraser shell; the blackboard eraser body comprises a connecting plate, a dry blackboard eraser arranged on one side of the connecting plate and a wet blackboard eraser arranged on the other side of the connecting plate; a storage cavity is arranged in the connecting plate, and a water storage bag is fixed at the position, close to the inner cavity wall of the wet blackboard eraser, of the storage cavity; a plurality of water outlet pipes penetrate through the connecting plate, one end of each water outlet pipe extends into the wet blackboard eraser, and the other end of each water outlet pipe is communicated with the water storage bag; a first check valve is arranged in the water outlet pipe and used for preventing water in the water outlet pipe from flowing from one side of the wet blackboard eraser to one side of the water storage bag; a rotating shaft is rotatably connected in the storage cavity, penetrates through the connecting plate, and is rotatably connected with the connecting plate through the rotating shaft; one side of the rotating shaft, which deviates from the blackboard eraser shell, is provided with an extrusion bulge, and the extrusion bulge is used for extruding the water storage bag.

By the technical scheme, when chalk writing on the blackboard needs to be erased, the shell of the blackboard eraser is controlled to rotate to one side of the dry blackboard eraser. When the dry eraser is completely accommodated in the blackboard eraser shell, the wet eraser is completely exposed out of the blackboard eraser shell. Meanwhile, the extrusion bulge contacts and extrudes the water storage bag, so that water in the water storage bag enters the wet blackboard eraser through the water outlet pipe to wet the wet blackboard eraser. Then, in the process of using the wet blackboard eraser to erase chalk writings on the blackboard, the chalk dust can be directly attached to the wet blackboard eraser, the teaching environment is not easily affected, and the health of teachers and students is not easily affected. When the chalk writing on the blackboard is erased, the shell of the blackboard eraser is turned to one side of the wet blackboard eraser. When the wet blackboard eraser is completely accommodated in the blackboard eraser shell, the dry blackboard eraser is completely exposed out of the blackboard eraser shell. Meanwhile, the extrusion bulge is separated from the water storage bag, and water in the water storage bag is not easy to enter the wet blackboard eraser through the water outlet pipe. And then, the blackboard is wiped again by using the dry blackboard eraser for absorbing residual moisture on the surface of the blackboard, so that the blackboard can be quickly dried, and when the chalk is used for writing on the blackboard, the chalk writing is clearer, and the teaching effect is better.

Preferably, a plurality of water inlet pipes penetrate through the connecting plate, one ends of the water inlet pipes extend into the drying eraser, and the other ends of the water inlet pipes are communicated with the water storage bag; and a second check valve is arranged in the water inlet pipe and is used for preventing water in the water inlet pipe from flowing to one side of the drying blackboard eraser from one side of the water storage bag.

Through the technical scheme, in the process of controlling the shell of the blackboard eraser to turn to one side of the wet blackboard eraser, the extrusion bulge is gradually far away from the water storage bag, the deformation of the water storage bag is gradually recovered, negative pressure is formed inside the water storage bag, and water adsorbed in the dry blackboard eraser is sucked into the water storage bag through the return pipe. Therefore, part of water absorbed by the dry blackboard eraser can be recycled, and the water replenishing times of the water storage bag are reduced, so that the use of the blackboard eraser is more convenient.

Preferably, a rotating hole is arranged on the connecting plate in a penetrating manner, and the rotating shaft penetrates through the rotating hole; a placing groove is formed in the inner hole wall of the rotating hole, a first spring is arranged in the placing groove, and a limiting ball is fixed at the end of the first spring; the blackboard eraser comprises a rotating shaft, a bearing, a spring I, a spring II and a spring II, wherein the rotating shaft is provided with a limiting groove symmetrically on two sides, when the dry blackboard eraser is accommodated in the blackboard eraser shell, the bearing is communicated with one limiting groove, the spring I pushes a limiting ball into the limiting groove, when the wet blackboard eraser is accommodated in the blackboard eraser shell, the bearing is communicated with the other limiting groove, and the spring I pushes the limiting ball into the limiting groove.

Through above-mentioned technical scheme, when dry board is wiped completely and is accomodate inside the blackboard eraser shell, the standing groove communicates with one of them spacing groove, and spring one pushes this spacing inslot portion through elasticity with spacing ball this moment for the restriction pivot rotates, so use the in-process of moist blackboard eraser for wiping the blackboard, the moist blackboard eraser is difficult for turning to the blackboard eraser shell, and the moist blackboard eraser is better to the effect of wiping of blackboard. When the wet blackboard eraser is completely stored in the blackboard eraser shell, the placing groove is communicated with the other limiting groove, the first spring pushes the limiting ball into the limiting groove through elasticity to limit the rotation of the rotating shaft, so that the dry blackboard eraser is not easy to turn to the blackboard eraser shell when the dry blackboard eraser is used for erasing the blackboard, and the erasing effect of the dry blackboard eraser on the blackboard is better.

Preferably, the rotation shaft includes a connection section and rotation sections provided at both ends of the connection section, the side wall of the connecting section is provided with a first telescopic rod, the extrusion bulge is arranged on the end part of the first telescopic rod far away from the connecting section, a second spring is arranged between the extrusion bulge and the connecting section and used for pulling the extrusion bulge to the connecting section, the rotating section penetrates through the rotating hole, a movable sleeve is connected to one side of the rotating section, which is close to the connecting section, through threads, the width of the movable sleeve is gradually reduced towards one side of the connecting section, a second telescopic rod is arranged at one side of the movable sleeve, which is far away from the connecting section, the second telescopic rod is arranged along the axial direction of the rotating section, the second telescopic rod is connected to the inner cavity wall of the storage cavity, and the movable sleeve is used for extruding the extrusion protrusion and the connecting section.

Through the technical scheme, the rotating section is driven to rotate in the rotating hole when the blackboard eraser shell rotates. Meanwhile, the movable sleeve in threaded connection with the rotating section slides along the axial direction of the rotating section under the limiting action of the second telescopic rod and enters between the extrusion bulge and the connecting section. Because the width of the movable sleeve is gradually reduced towards one side of the connecting section, when the movable sleeve continuously extends into the space between the extrusion bulge and the connecting section, the extrusion bulge can be gradually pushed away from the connecting section by the movable sleeve. That is, every time the blackboard eraser housing is rotated, the squeezing of the water storage bag by the squeezing protrusions is increased. So when the water storage bag appears that inside water storage is less because of the live time is longer, extrude protruding still can extrude the inside water of water storage bag through the outlet pipe through the extrusion.

Preferably, the spring is sleeved on the second telescopic rod, and the inner ring of the spring is abutted to the outer ring of the second telescopic rod.

Through the technical scheme, the telescopic rod can guide the extension and retraction of the second spring, so that the second spring is not easy to bend.

Preferably, the extrusion bulge is provided with a guide inclined plane near the connecting section, and the guide inclined plane is used for fitting the outer wall of the movable sleeve.

Through above-mentioned technical scheme, set up the guide inclined plane near the linkage segment department at the extrusion arch, so the extrusion arch can more conveniently enter into between extrusion arch and the linkage segment.

Preferably, the end part of the water outlet pipe, which deviates from the water storage bag, is provided with a spherical connecting cap, and the side wall of the spherical connecting cap is provided with a plurality of water outlet holes.

Through the technical scheme, water entering the spherical connecting cap through the water outlet pipe can be dispersed through the water outlet hole so as to more fully wet the wet blackboard eraser.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged view of a portion B of fig. 1.

Reference numerals: 1. a storage cavity; 2. a water storage bag; 3. a blackboard eraser housing; 4. a blackboard eraser body; 41. a connecting plate; 42. drying the blackboard eraser; 43. wet blackboard eraser; 5. a water outlet pipe; 6. a one-way valve I; 7. a rotating shaft; 71. a connecting section; 72. a rotating section; 8. extruding the bulge; 9. a water inlet pipe; 10. a second one-way valve; 11. rotating the hole; 12. a placement groove; 13. a first spring; 14. a limiting ball; 15. a limiting groove; 16. a first telescopic rod; 17. a second spring; 18. a movable sleeve; 19. a second telescopic rod; 20. a guide ramp; 21. a spherical connecting cap; 22. and (7) water outlet holes.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.

A high-efficiency teaching aid is shown in figure 1 and comprises a blackboard eraser shell 3 and a blackboard eraser body 4 arranged in the blackboard eraser shell 3.

As shown in fig. 1, 2 and 3, the blackboard eraser body 4 includes a connecting plate 41, a dry eraser 42 disposed on one side of the connecting plate 41, and a wet eraser 43 disposed on the other side of the connecting plate 41. A storage cavity 1 is arranged in the connecting plate 41, and a water storage bag 2 is fixed at the inner cavity wall of the storage cavity 1 close to the wet blackboard eraser 43. One side of the connecting plate 41 close to the dry board eraser 42 is provided with a plurality of water inlet pipes 9 in a penetrating way, one end of each water inlet pipe 9 extends into the dry board eraser 42, and the other end of each water inlet pipe 9 is communicated with the water storage bag 2. The second check valve 10 is arranged in the water inlet pipe 9, and the second check valve 10 is used for preventing water in the water inlet pipe 9 from flowing to the side of the dry board eraser 42 from the side of the water storage bag 2. One side of the connecting plate 41, which is close to the wet eraser 43, is provided with a plurality of water outlet pipes 5 in a penetrating way, one end of each water outlet pipe 5 extends into the wet eraser 43, and the other end of each water outlet pipe 5 is communicated with the water storage bag 2. The one-way valve 6 is arranged in the water outlet pipe 5, and the one-way valve 6 is used for preventing the water in the water outlet pipe 5 from flowing to one side of the water storage bag 2 from one side of the wet blackboard eraser 43. The end part of the water outlet pipe 5 departing from the water storage bag 2 is provided with a spherical connecting cap 21, and the side wall of the spherical connecting cap 21 is provided with a plurality of water outlet holes 22.

The connecting plate 41 is provided with a rotating hole 11 in a penetrating mode, a placing groove 12 is formed in the inner hole wall of the rotating hole 11, a first spring 13 is arranged inside the placing groove 12, and a limiting ball 14 is fixed to the end portion of the first spring 13. The connecting plate 41 is rotatably connected with a rotating shaft 7, the two sides of the rotating shaft 7 are symmetrically provided with limiting grooves 15, when the dry eraser 42 is accommodated in the blackboard eraser housing 3, the placing groove 12 is communicated with one limiting groove 15, the first spring 13 pushes the limiting ball 14 into the limiting groove 15, when the wet eraser 43 is accommodated in the blackboard eraser housing 3, the placing groove 12 is communicated with the other limiting groove 15, and the first spring 13 pushes the limiting ball 14 into the limiting groove 15.

The rotation shaft 7 includes a connection section 71 and rotation sections 72 provided at both ends of the connection section 71. The side wall of the connecting section 71 is provided with a first telescopic rod 16, the end part of the first telescopic rod 16 far away from the connecting section 71 is provided with an extrusion bulge 8, and the extrusion bulge 8 is used for extruding the water storage bag 2, so that water in the water storage bag 2 is discharged through the water outlet pipe 5. The first telescopic rod 16 is sleeved with a second spring 17, and the outer wall of the first telescopic rod 16 is abutted to the inner ring of the second spring 17. One end of the second spring 17 is connected to the pressing protrusion 8, the other end of the second spring 17 is connected to the connection section 71, and the second spring 17 is used for pulling the pressing protrusion 8 to one side of the connection section 71. The rotating section 72 penetrates through the rotating hole 11, the movable sleeve 18 is in threaded connection with one side of the rotating section 72 close to the connecting section 71, and the width of the movable sleeve 18 is gradually reduced towards one side of the connecting section 71. One side of the movable sleeve 18, which is far away from the connecting section 71, is provided with a second telescopic rod 19, the second telescopic rod 19 is arranged along the axial direction of the rotating section 72, the second telescopic rod 19 is connected to the inner cavity wall of the storage cavity 1, and the movable sleeve 18 is used for being extruded between the extrusion protrusion 8 and the connecting section 71. The extrusion protrusion 8 is provided with a guiding inclined plane 20 near the connecting section 71, and the guiding inclined plane 20 is used for fitting the outer wall of the movable sleeve 18.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. An efficient teaching aid comprises a blackboard eraser shell (3) and a blackboard eraser body (4) arranged in the blackboard eraser shell (3); the method is characterized in that: the blackboard eraser body (4) comprises a connecting plate (41), a dry blackboard eraser (42) arranged on one side of the connecting plate (41) and a wet blackboard eraser (43) arranged on the other side of the connecting plate (41); a storage cavity (1) is arranged in the connecting plate (41), and a water storage bag (2) is fixed on the inner cavity wall of the storage cavity (1) close to the wet blackboard eraser (43); a plurality of water outlet pipes (5) penetrate through the connecting plate (41), one ends of the water outlet pipes (5) extend into the wet blackboard eraser (43), and the other ends of the water outlet pipes (5) are communicated with the water storage bag (2); a one-way valve I (6) is arranged in the water outlet pipe (5), and the one-way valve I (6) is used for preventing water in the water outlet pipe (5) from flowing to one side of the water storage bag (2) from one side of the wet blackboard eraser (43); a rotating shaft (7) is rotatably connected in the storage cavity (1), the rotating shaft (7) penetrates through the connecting plate (41), and the blackboard eraser shell (3) is rotatably connected with the connecting plate (41) through the rotating shaft (7); one side of the rotating shaft (7) departing from the blackboard eraser shell (3) is provided with an extrusion bulge (8), and the extrusion bulge (8) is used for extruding the water storage bag (2).

2. A high efficiency teaching aid as claimed in claim 1 wherein: a plurality of water inlet pipes (9) penetrate through the connecting plate (41), one ends of the water inlet pipes (9) extend into the drying eraser (42), and the other ends of the water inlet pipes (9) are communicated with the water storage bag (2); the drying blackboard eraser is characterized in that a second check valve (10) is arranged inside the water inlet pipe (9), and the second check valve (10) is used for preventing water in the water inlet pipe (9) from flowing to one side of the drying blackboard eraser (42) from one side of the water storage bag (2).

3. A high efficiency teaching aid as claimed in claim 1 wherein: a rotating hole (11) penetrates through the connecting plate (41), and the rotating shaft (7) penetrates through the rotating hole (11); a placing groove (12) is formed in the inner hole wall of the rotating hole (11), a first spring (13) is arranged in the placing groove (12), and a limiting ball (14) is fixed at the end part of the first spring (13); limiting grooves (15) are symmetrically formed in two sides of the rotating shaft (7), when the dry blackboard eraser (42) is stored in the blackboard eraser shell (3), the placing groove (12) is communicated with one limiting groove (15), the first spring (13) pushes the limiting ball (14) into the limiting groove (15), when the wet blackboard eraser (43) is stored in the blackboard eraser shell (3), the placing groove (12) is communicated with the other limiting groove (15), and the first spring (13) pushes the limiting ball (14) into the limiting groove (15).

4. A high efficiency teaching aid as claimed in claim 3 wherein: the rotating shaft (7) comprises a connecting section (71) and rotating sections (72) arranged at two ends of the connecting section (71), a first telescopic rod (16) is arranged at the side wall of the connecting section (71), the extrusion protrusion (8) is arranged at the end part of the first telescopic rod (16) far away from the connecting section (71), a second spring (17) is arranged between the extrusion protrusion (8) and the connecting section (71), the second spring (17) is used for pulling the extrusion protrusion (8) to the connecting section (71), the rotating sections (72) pass through the rotating holes (11), a movable sleeve (18) is connected to one side, close to the connecting section (71), of the rotating sections (72) in a threaded manner, the width of the movable sleeve (18) is gradually reduced towards one side of the connecting section (71), and a second telescopic rod (19) is arranged on one side, deviating from the connecting section (71), of the movable sleeve (18), the second telescopic rod (19) is arranged along the axial direction of the rotating section (72), the second telescopic rod (19) is connected to the inner cavity wall of the storage cavity (1), and the movable sleeve (18) is used for extruding the extruding protrusion (8) and the connecting section (71).

5. The high-efficiency teaching aid of claim 4, wherein: the second spring (17) is sleeved on the second telescopic rod (19), and the inner ring of the second spring (17) is abutted to the outer ring of the second telescopic rod (19).

6. The high-efficiency teaching aid of claim 4, wherein: the extrusion bulge (8) is provided with a guide inclined plane (20) close to the connecting section (71), and the guide inclined plane (20) is used for being attached to the outer wall of the movable sleeve (18).

7. A high efficiency teaching aid as claimed in claim 1 wherein: the water outlet pipe (5) deviates from the end part of the water storage bag (2) and is provided with a spherical connecting cap (21), and a plurality of water outlet holes (22) are formed in the side wall of the spherical connecting cap (21).